#!/usr/bin/env python

__author__ = "bt3gl"

# given two text, find the difference between them
# useful for ciphers, for example vinegere, when
# everything is all together

def find_word(A, B):
    FOUND = False
    for i in range(min(len(A), len(B))):
        if A[i] != B[i] and not FOUND:
            index = i
            FOUND = True
    return index



if __name__ == '__main__':
    A = 'THISTIMEWEWILLGIVEYOUMOREPLAINTEXTTOWORKWITHYOUWILLPROBABLYFINDTHATHAVINGEXTRACONTENTTHATISASCIIMAKESTHISONEMORESOLVABLEITWOULDBESOLVABLEWITHOUTTHATBUTWEWILLMAKESURETOGIVELOTSOFTEXTJUSTTOMAKESURETHATWECANHANDLEITIWONDERHOWMUCHWILLBEREQUIREDLETSPUTTHEMAGICPHRASEFORTHENEXTLEVELINTHEMIDDLERIGHTHERENOTHINGTRICKYOKNOWMORETEXTTOMAKESURETHATITISSOLVABLEISHOULDPROBABLYJUSTPUTINSOMENURSERYRHYMEORSOMETHINGMARYHADALITTLELAMBLITTLELAMBLITTLELAMBMARYHADALITTLELAMBWHOSEFLEEZEWASWHITEASSNOWIDONTWANTTOMAKETHISHARDERTHANITNEEDSTOBEIFYOUVESOLVEDALOTOFSIMPLECRYPTOCHALLENGESYOUPROBABLYALREADYHAVETHECODEANDWILLBREEZERIGHTTHROUGHITIFITHELPSMOSTOFTHEPLAINTEXTISSTATICATEACHOFTHELEVELSIMNOTAMASOCHISTTHEFUNNYTHINGISTHATDEPENDINGONWHICHRANDOMKEYYOUGETTHATPOEMMIGHTBEEXACTLYTHERIGHTOFFSETTOSUCCESSFULLYMOUNTANATTACKWELLSEELITTLEBITMORELITTLEBITMORETHERE'
    B = 'THISTIMEWEWILLGIVEYOUMOREPLAINTEXTTOWORKWITHYOUWILLPROBABLYFINDTHATHAVINGEXTRACONTENTTHATISASCIIMAKESTHISONEMORESOLVABLEITWOULDBESOLVABLEWITHOUTTHATBUTWEWILLMAKESURETOGIVELOTSOFTEXTJUSTTOMAKESURETHATWECANHANDLEITIWONDERHOWMUCHWILLBEREQUIREDLETSPUTTHEMAGICPHRASEFORTHENEXTLEVELINTHEMIDDLERIGHTHEREBLAHLAHOKNOWMORETEXTTOMAKESURETHATITISSOLVABLEISHOULDPROBABLYJUSTPUTINSOMENURSERYRHYMEORSOMETHINGMARYHADALITTLELAMBLITTLELAMBLITTLELAMBMARYHADALITTLELAMBWHOSEFLEEZEWASWHITEASSNOWIDONTWANTTOMAKETHISHARDERTHANITNEEDSTOBEIFYOUVESOLVEDALOTOFSIMPLECRYPTOCHALLENGESYOUPROBABLYALREADYHAVETHECODEANDWILLBREEZERIGHTTHROUGHITIFITHELPSMOSTOFTHEPLAINTEXTISSTATICATEACHOFTHELEVELSIMNOTAMASOCHISTTHEFUNNYTHINGISTHATDEPENDINGONWHICHRANDOMKEYYOUGETTHATPOEMMIGHTBEEXACTLYTHERIGHTOFFSETTOSUCCESSFULLYMOUNTANATTACKWELLSEELITTLEBITMORELITTLEBITMORETHERE'

    index = find_word(A, B)
    print A[index: index + 15]
    print B[index: index + 15]